简介:Characteristicvaluesandtestingmethodsfordeepdrawingprocesses;Comparisonofexperimentalandsimulateresultsforamildsteelandadual-phasesteeldeformedundertensionanddeep-drawing;Computer-aidedprocessdesignsystemforaxisymmetricdeepdrawing;Contactlesson-linemeasurementofmaterialflowforclosedloopcontrolofdeepdrawing;Deepdrawingofnickelfoilandstainlesssteelfoil;
简介:Adatabaseorientedprocesscontroldesignalgorithmforimprovingdeep-drawingperformance,Afiniteelementandexperimentalstudyofsheetdeformationasinfluencedbydrawbeadendgeometry,Anoteondeepdrawingprocess:numericalsimulationandexperimentalvalidation,Anovelrolling-annealingcycleforenhanceddeepdrawingpropertiesinIFsteels,Anoveltechniqueoffrictionaideddeepdrawingusingablank-holderdividedintofoursegments.
简介:Drivesystemoptimizationofhydraulicdeepdrawingpressesfordevelopmentandcommissioning;Economicallaser-cutblanksfordeepdrawing;Effectofanisotropyandprebulgingonhydromechanica!deepdrawingofmildsteelcups;EnhancetheFormabilityofSheetMetalviaSmartTooling;Experimentalandnumericalapproachesofspringbackofhigh-performancesteelsdrawnwithu-shapedtoolsandanindustrialsidemembertool
简介:Afundamentalstudyofcanformingbythestretch-drawingprocess;Anexerciseincoldironingasthepost-forgingoperationfornet-shapemanufacture;Designofhorizontalmechanicalpressesfordeepdrawingandironingprocess;DevelopmentofsimulationcodeforcalculatingresidualstressdistributioninD-Icansproducedbyboth-sidedironingprocess;Fractureanalysisoftubedrawingwithamandrel;Improvementoffillingratioandreductionofformingpressure-atrialforformingofaspurgearmadefromthedrawncupⅡ
简介:铜拉链的拉头加工工艺,在冲裁、弯形和对折弯形后整形。使处于2.7±0.05mm空间中的倒U字形条,整形成2.60-0.15×4.3mm×63°10'的V字形条。整形后V字形条要与拉头外形的中心线对称,由于拉链的产量大,价格便宜,故铜拉头冲压整形是关键性的工序。而要从两边仅为0.05㎜的单边间隙中,将倒U字形条整形成V字形条。可采用支承块支撑拉头,压板是依靠橡皮弹力轻压拉头,并需要进行完全定位。然后,在左右斜块作用下,使安装在左右滑块上左右挤板产生挤压,将U字形条整形成V字形条。这种整形成形效果不仅使成形的效率高,而且是整形成形的对称性好,整形的质量高、价格便宜。
简介:运用循环伏安法、线性电位扫描法研究木糖醇在碱性溶液(含锑)中的电化学稳定性及锑在木糖醇碱性溶液中的沉积动力学参数;采用计时电流法研究锑在不锈钢阴极上的电化学成核机理。循环伏安测试结果表明,木糖醇在碱性溶液中的稳定性较好,在-1.20V~+0.60V(vsHg/HgO)范围内无氧化还原反应发生,在电位负于-1.70V(vs.Hg/HgO)时木糖醇在锑电极上可能发生分解。在该体系中,锑在阴极上的沉积经历了不可逆电结晶过程。根据线性电势扫描结果,锑沉积的活化能、表观传递系数、交换电流密度等动力学参数分别为46.33kJ/mol、0.64和4.40×10-6A/m2。计时电流法实验结果表明,锑在碱性木糖醇溶液中的成核机理符合扩散控制下的三维连续成核模型,外加电位对晶体生长速率和恒定电位下的饱和晶核密度有显著影响。通过分析恒电位阶跃曲线,求出锑离子在该体系中的扩散系数为1.53×10-6cm2/s。